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5.0 Environmental Analysis 5.2 Biological Resources <br />Avion Project SEIR <br />Page 5.2-11 <br />Sensitive Wildlife: The San Diego desert woodrat nest observed on-site occurs approximately <br />50 feet east of the grading limit and 45 feet east of where the limit fence would be placed. Therefore, <br />impacts to the San Diego desert woodrat would not occur. <br />Potential impacts to species with a moderate potential for occurrence (e.g., Belding’s orange- <br />throated whiptail, coastal whiptail, southern California rufous-crowned sparrow) are not expected to <br />affect a large number of individuals; therefore, any impacts to these species are not considered <br />significant. Potential impacts to the Cooper’s hawk would be considered significant. <br />Direct impacts could occur to Cooper’s hawk and/or rufous-crowned sparrow that have a moderate <br />to high potential to occur within the project area due to mass grading and vegetation removal. <br />Impacts to these species identified as listed, candidate, sensitive, or special status in the MSCP are <br />considered significant and require biological monitoring and avoidance of typical nesting periods. <br />d. Jurisdictional Waters and Wetlands <br />The project would not impact any federal, state, or city jurisdictional waters, including wetlands. The <br />major access private drive into the project site would cross the eastern drainage course with an <br />arch-culvert type bridge crossing resulting in no permanent impacts to the bed or bank of the <br />drainage. The drainage course would remain in its natural soft-bottom configuration. Grading limits <br />along the western and eastern boundaries would not encroach into the ephemeral streambeds or <br />wetlands. <br />In accordance with San Diego Municipal Code Section 143.0141, a wetland buffer that ranges <br />between 171 feet and 186 feet is being maintained on the eastern side of the project to protect and <br />maintain the functions and values of the remaining on-site wetland areas (Figure 5.2-4). The buffer is <br />located between the jurisdictional wetlands and the edge of the development to avoid and minimize <br />any indirect edge effects to the wetlands. The buffer would include the manufactured 2.2:1 to 1.5:1 <br />slopes to the east of the project, approximately 30 to 96 feet tall. These steep slopes would be <br />revegetated with native species and also function as a barrier to pedestrians as the slopes would be <br />too steep to walk. The wetland buffer distances would protect and maintain the biological, chemical, <br />and physical functions of the wetlands. <br />5.2.4.3 Significance of Impacts <br />a. Vegetation Communities <br />Impacts to coastal sage scrub, southern mixed chaparral, and non-native grassland would be <br />significant. <br />b. Sensitive Plants <br />No impacts to sensitive plant species would occur.